package PTA.Mianxiangduixiang.ex13;

import java.util.Scanner;

public class ex13 {
    public static void main(String[] args) {


        double dd = RR.fun();
        System.out.printf("%.2f",dd);

    }
}
class RR{
public static double fun(){
    Scanner sc = new Scanner(System.in);
    String line = sc.nextLine();
    String str[]=line.split(" ");
    double result = Integer.valueOf(str[2]);
    return result;


}


}